package my1st;

//文件名InsufficientFundsException.java
import java.io.*;

//自定义异常类，继承Exception类
public class InsufficientFundsException extends Exception
{
//此处的amount用来储存当出现异常（取出钱多于余额时）所缺乏的钱
private double amount;
public InsufficientFundsException(double amount)
{
 this.amount = amount;
} 
public double getAmount()
{
 return amount;
}
}
